'use strict'
const path = require('path')
const defaultSettings = require('./src/settings.js')

function resolve (dir) {
  return path.join(__dirname, dir)
}

module.exports = {
  resolve: {
    alias: {
      '@': path.resolve(__dirname, 'src')
    }
  }
}

const name = defaultSettings.title || 'vue Admin Template' // page title

const port = process.env.port || process.env.npm_config_port || 8080 // dev port

module.exports = {
  publicPath: '/',
  outputDir: 'dist',
  // assetsDir: 'static',
  // lintOnSave: process.env.NODE_ENV === 'development',
  productionSourceMap: false,
  devServer: {
    port: port,
    client: {
      overlay: false
    },
    open: true,
    hot: true // 开启热重载
  },
  configureWebpack: {
    name: name,
    resolve: {
      alias: {
        '@': resolve('src')
      }
    },
    optimization: {
      runtimeChunk: 'single'
    }
  },
  chainWebpack (config) {
    config.module.rule('svg').exclude.add(resolve('src/icons')).end()
    config.module
      .rule('icons')
      .test(/\.svg$/)
      .include.add(resolve('src/icons'))
      .end()
      .use('svg-sprite-loader')
      .loader('svg-sprite-loader')
      .options({
        symbolId: 'icon-[name]'
      })
      .end()
    config.when(process.env.NODE_ENV !== 'development', config => {
      // config
      //   .plugin('ScriptExtHtmlWebpackPlugin')
      //   .after('html')
      //   .use('script-ext-html-webpack-plugin', [
      //     {
      //       // `runtime` must same as runtimeChunk name. default is `runtime`
      //       inline: /runtime\..*\.js$/
      //     }
      //   ])
      //   .end()
      config.optimization.splitChunks({
        chunks: 'all',
        cacheGroups: {
          libs: {
            name: 'chunk-libs',
            test: /[\\/]node_modules[\\/]/,
            priority: 10,
            chunks: 'initial' // only package third parties that are initially dependent
          },
          elementUI: {
            name: 'chunk-elementUI', // split elementUI into a single package
            priority: 20, // the weight needs to be larger than libs and app or it will be packaged into libs or app
            test: /[\\/]node_modules[\\/]_?element-ui(.*)/ // in order to adapt to cnpm
          },
          commons: {
            name: 'chunk-commons',
            test: resolve('src/components'), // can customize your rules
            minChunks: 3, //  minimum common number
            priority: 5,
            reuseExistingChunk: true
          }
        }
      })
      // https:// webpack.js.org/configuration/optimization/#optimizationruntimechunk
      config.optimization.runtimeChunk('single')
    })
  },
  css: {
    loaderOptions: {
      postcss: {
        postcssOptions: {
          plugins: [
            require('autoprefixer')({
              overrideBrowserslist: ['> 1%', 'last 2 versions']
            }),
            require('postcss-pxtorem')({
              rootValue: 16, // 1rem = 16px
              propList: ['*'], // 全部属性都转换
              selectorBlackList: ['html'], // 不处理html标签
              exclude: /node_modules/i // 排除node_modules
            })
          ]
        }
      }
    }
  }
}
